The standing ITB stretch is a great exercise that can be done anywhere at any time.
If you wish to stretch the IT band of your right leg, stand with your left side facing a wall.
Cross your right leg behind your left, whilst putting your left hand against the wall for support. Put your weight on the right leg and lean against the wall by pushing your right hip away from the wall. Try to drop your left hip to increase the stretch on the right ITB.
Be sure that your right foot is parallel to the wall during the stretch. You should really be able to feel the stretch in your right hip and down the length IT band on the outside of the leg. Hold for around 30-45 seconds and do this around 2-3 times a day remembering to also stretch the unaffected leg for balance.